my first script LY GUI

-- LocalScript: Place this in StarterPlayer > StarterPlayerScripts

-- SERVICES
local Players = game:GetService("Players")
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local Lighting = game:GetService("Lighting")
local RunService = game:GetService("RunService")

-- PLAYER
local player = Players.LocalPlayer

-- REMOTE SETUP
local remoteEvent = ReplicatedStorage:FindFirstChild("FE_GUI_Action") or Instance.new("RemoteEvent")
remoteEvent.Name = "FE_GUI_Action"
remoteEvent.Parent = ReplicatedStorage

-- SERVER HANDLER (Runs on server using BindableEvent simulation)
if RunService:IsServer() then
	local flyingPlayers = {}

	local function getRootPart(character)
		return character:FindFirstChild("HumanoidRootPart") or character:FindFirstChild("Torso")
	end

	remoteEvent.OnServerEvent:Connect(function(player, action)
		local char = player.Character
		if not char then return end
		local root = getRootPart(char)
		if not root then return end

		if action == "TeleportToSpawn" then
			root.CFrame = CFrame.new(0, 10, 0)

		elseif action == "PrintHello" then
			print(player.Name .. " clicked Hello!")

		elseif action == "ToggleFly" then
			if flyingPlayers[player] then
				local bv = root:FindFirstChild("BodyVelocity")
				if bv then bv:Destroy() end